Disposal container with replaceable liner



July 24, 1956 c. LlsclANl 2,755,971

DISPOSAL CONTAINER WITH REPLACEABLE LINER Filed Jan. 27, 1953 Z5 ZL 2 y J ffy' -2-6 Jo' 32 \2 i f| E 3] l\ i :33 l .9r L n fravenZLor-f 9 Comfamfz'rzealsciamz;

DISPOSAL CONTAINER WITH REPLACEABLE LINER Constantine Lisciani, Chicago, Ill., assignor to The Protectoseal Company, Chicago, lll., a corporation of liliu nois Application January 27, 1953, Serial No. 333,514

Claims. (Cl. 222-189) This invention relates to a disposal can and more particularly to a laboratory disposal can as a temporary receiver of waste liquids such as waste reagents, solutions, solvents and the like, which in a vapor or in a liquid state may be toxic, inflammable, poisonous, etc.

A principal object of this invention is to provide a disposal can of this type with a replaceable liner from synthetic, thermoplastic material or suitable elastomeric rnaterial, which is unaffected by reagents and the like which normally attack the metal of the disposal can or container.

Still another object of the invention is to provide a disposal can or container of this type which may be cheaply and economically made from metals which are normally attacked by waste reagents, solutions, and solvents, but by the incorporation of a liner from material inert to such uids, there is provided a container of this type which may be more cheaply manufactured than more expensive glass-lined containers or those made from stainless steel.

Another object of the invention is to provide a liner of this type which may be fabricated from either tubular or heat-sealed, inert, thermo-plastic sheet material in which the seams are heat-sealed, and may have the bottom and top thereof fabricated from separate sheets conforming to the periphery of the container and the top having a spout incorporated therewith.

Still another object of the invention is to form a replaceable liner of this type from folded thermo-plastic material which is inert to any of the above reagents, solvents, etc., normally effecting metal and to which a tubular spout is applied.

Still another object of this invention is to provide a replaceable liner of this type which may be readily inserted through the opening of the disposal can and locked to the spout of the container so that upon the liner becoming worn out, the replaceable liner may be readily detached and replaced with a new liner without the need of replacing the container.

Another object of the invention is to incorporate a replaceable liner of this type in a disposal container equipped with a flame arrester mounted within the container spout, permitting the ame arrester to be withdrawn and the replaceable liner mounted within the container and the flame arrester inserted within the spout.

Another object of the invention is to provide a replaceable liner of this type fabricated from tubular or sheet thermo-plastic material which is highly inert to waste liquids such as Waste reagents, solutions, solvents and the like in which the material forming the lining is fabricated from the group of thermo-plastics known as polyethylene, Du Pont Teflon, and Kellog Kel-F.

Another object of the invention is to incorporate a liner of this type in a disposal can of the type as disclosed and claimed in my co-pending application for a disposal can, Serial No. 173,201, tiled July 1l, 1950, now Patent No. 2,685,386.

Another object of the invention is to provide a large nited States Patent O ICC spout opening with means for retaining the spout of the replaceable liner in place, in which the liner is assembled within the container through the spout, and in which a flame arrester is detachably mounted within the spout of the liner and the container.

Still another object of the invention is to provide a closure and closure operating means for a large pouring and receiving spout in which a spring tightly seats the closure upon the spout liner as it overlaps the top edge of the container spout, and in which the force of the spring is overcome when the closure operating means has been moved by an operative motion to the open position of the closure.

Still another object is to provide a handle contiguous to the closure operating means by means of which the can may be handled, and to also facilitate the manipulation of the closure operating means in inserting a liner Within the container and in the replacement thereof.

Still another object of the invention is to provide a detachable tire-protection screen for the large spout opening formed by the spout opening of the liner and of the container, and which may be readily removed for cleaning or in the detachment and replacement of the liner.

A further object of the invention is to provide an improved laboratory disposal can having a replaceable liner which is adapted to resist the corrosive action of the liquids disposed of therein.

Many other objects and advantages of the construction herein shown and described will be obvious to those skilled in the art from the disclosure herein given.

To this end, my invention consists in the novel construction, arrangement and combination of parts herein shown and described, and more particularly pointed out in the appended claims.

In the drawings, wherein like reference characters indicate like or corresponding parts:

Fig. l is a side elevation, partly in section, of a laboratory disposal can equipped with a spout closure operating mechanism and ame arrester and embodying a simple form of the replaceable liner of the present invention;

Fig. 2 is a View in side elevation of one embodiment of the replaceable liner removed from the container; and,

Fig. 3 is a side elevation of a modiiied form of replaceable liner formed from folded sheet material.

Referring to the drawing which is illustrative of several embodiments of the replaceable liner of this invention, a disposal can 5 of conventional form, such as disclosed and claimed in my co-pending application, Serial No. 173,201, filed July 11, 1950, now Patent No. 2,685,386, is provided with a dome-shaped top 6 from which projects an enlarged pouring and receiving spout 7 through which the can may be filled and from which the contents may be discharged. The tubular sheet metal spout is clinched over as indicated at 8 to the opening in the dome and silver soldered. Although described as being afiiXed, as illustrated, it is to be understood that the spout may be Welded or otherwise secured Without departing from the scope of the invention. Within the disposal can 5 is positioned a replaceable liner 9 which is formed from a sheet-like elastomeric material. This material is inert to the reagents, solutions, solvents, etc., which in a vapor or in a liquid state may not only be toxic, inflammable, poisonous, etc., but which would normally corrode and react with a steel container which is formed usually from terne plate and/or from stainless steel so that the disposal can, if not provided with. a liner of this type, would normally have to be replaced after very short periods of use. Without the replaceable liner, a container or disposal can formed from conventional materials, if used without a liner of this invention, would tend to leak and cause considerable damage by the leakage of the reagents and possible fires, if the volatile solvents which leak from the container would come in contact with a source of heat sucient to ignite the fluids leaking from the container. The replaceable liner 9 is provided with a spout 10 which is adapted to be mounted within the container spout 7, which is also sufficiently large to permit the replaceable liner to be inserted within the disposal can through the spout opening. The liner 9 is assembled in position by a securing means such as a split ring 11 complementally retaining the spout 10 in an annular groove 12, and the overlapping end 13 of the liner spout it) is affixed to the upper end of the container spout 7 by a similar snap ring 14. By overlapping the end of the liner spout, liquids poured within the container are prevented from coming in contact with the interior of the container.

From the lower end of the spout, a flame arrester or removable re screen baffle 15 extends within the container, as is customary for cans containing hazardous liquids. The flame arrester 15 also provides a strainer preventing foreign particles from reaching the liquid contents of the can through the spout, and retaining within the disposal can such foreign particles as may be in the liquid. The flame arrester is suitably affixed to the disposal can spout 7, and within the replaceable liner spout 10 by an annular screen collar 16. The collar is held in place against the seat formed by the spout collar 10 as it extends about and in contact against the annular clinched portion 3 of the spout collar 7 as it is clinched to the opening in the dome 6 of the disposal can. The annular screen collar 16 is prevented from moving outwardly by three inwardly extending U-shaped lugs 17 peripherally spaced about the snap ring 11.

The flame arrester 15 is Vformed from a cup-shaped perforated screen 18, which is preferably formed from electro-tinplate material, 26 gage steel, and provided with No. 3 perforations, 0.040" diameter-staggered. The upper end of this cup-shaped member is welded or otherwise secured to the annular screen collar 16. A detachable inner screen 19 is complementally formed to the outer screen 1S and provided with an upper lip 20 to seat on the annular seat 21 of the screen collar 16. The inner screen is preferably tack soldered to retain it in position. The inner screen collar is preferably formed from brass and suitably perforated with No. 3 perforations, 0.040 diameter, suitably staggered. The collar is formed from steel and preferably cadmium plated. Each of the cupshaped screens 18 and 19 is formed respectively with bottom screen members 18' and 19' held in place to the tubular members by annularly crimping the lower edges thereof, as illustrated in cross-section, Fig. l.

The disposal can spout 7 is preferably spun to the shape as shown to provide the portion 8 to be crimped to the dome of the can and also with the annular groove 12 to receive the split ring 11. At its open end, it is turned back upon itself at 22 to provide an annular seat for a Buna cork seal 23 of the closure cap 24 wherein the seal 23 engages the turned-over portion 13 of the replaceable liner spout 10. The turned-over portion 22 of the disposal can spout 7 also serves to provide a complementally formed latch construction to prevent the snap ring 14 from being removed. Although it is preferred to use a snap ring, other forms of clamps may be used without departing from the scope of the invention. The snap ring 14 may be a plain ring or one .formed with outwardly extending lugs similar to the inwardly extending lugs 17 of the split ring 11.

Referring to Fig. 2, the replaceable liner which may be formed from a cylindrical or tubular body 25 is complementally formed to be received within the inner periphery of the disposal can 5. It is possible to form the body portion 25 from an extruded tube of a substantially inert, thermo-plastic, elastomeric material or from a sheet assembled to form the tubular shape complemental to the cylindrical portion of the can. The dome-shaped t'op portion 26 and bottom portion 27 may likewise be suitably formed from the material from which the liner is made and heat-sealed along the peripheral seams 28 and 29. The spout 10 may be formed from extruded tubularshaped material to the size complemental to the interior of the disposal can spout 7 or it may be fabricated from sheet material to the tubular shape as shown, and the bottom edge may be heat-sealed about the periphery of the opening in the upper dome 26 and so located that the axis thereof corresponds to the axis of the can spout. ln order to place this replaceable liner in position within the container, it is substantially flattened out and then suitably rolled to such a size that the entire replaceable liner 9 can be inserted through the spout 7. It is also preferable in rolling up the liner for insertion to roll it substantially along the axis of the liners 10 so that it may bc more readily inserted through the container spout.

A simpler form of replaceable liner 30 is illustrated in Fig. 3 which may be preferably formed from a sheet of the inert thermo-plastic elastomeric material by folding over an elongated sheet of the material and heat-sealing the folded-over sheet along the peripheral edges 31, 32, and 33. It is also to be understood that it may be similai-ly formed by assembling two similar sheets and heatseaiing about the peripheral edges of the assembled sheets. A liner spout 10 may be formed from tubular thermo-plastic, inert, elastomeric material or from a strip suitably formed and heat-sealed to an opening, for example, as provided in the upper edge 32 of the replaceable liner 3i), Fig. 3. Other arrangements will suggest themselves to those skilled in the art of fabricating receptacles of this type. The replaceable liner is also assembled within the container or disposal can 5 by rolling it up preferably along the axis of the liner spout 10', whereupon as it becomes unrolled, or the fluids are poured within the container, and assumes the shape of the interior of the container.

lt is preferred to form the replaceable liner in either of the embodiments of Figs. 2 and 3 from inert, thermoplastic, elastomeric material of commercial materials available, such as inert materials of the class of Dow- Chemical Polyethylene, Du Pont Teflon, and Kellog Kel-F, which are inert and not affected by waste liquids such as waste reagents, solutions, solvents and the like which in a vapor or in a liquid state may be toxic, inflammable, poisonous, etc., and which normally corrode and react with the metal containers formed from steel, terne plate or stainless steel and the like, substantially non-corrosive materials. Dow-Chemical Polyethylene is a polythane polymeric organic compound. Du Pont Teflon is a tetrafluro ethylene gas derivative or it may be a poly-tetralluro ethylene. Kellog Kel-JE is a triiluro-chloroethylene polymer.

In assembling the replaceable liners of the modifications of Fig. 2 or Fig. 3 within the disposal can 5 after they have become substantially worn or leak to such an extent that the container may become damaged, the waste fluids are first disposed of and the replaceable liner suitably ilushed to remove any of the remaining fluid. The operator then removes the liner through the disposal can spout '7 by first detaching the snap ring 14 whereupon the closure 24 is opened and the split ring 11 is detached and withdrawn from the spout, after which the flame arrester 15 is removed. The liner 9 or 30 may then be pulled `out through the disposal can spout 7, either by hand or with suitable tools, if any of the fluids are such that they might cause burns, etc., to the person removing the liner. A new liner is then replaced after rolling it up in the manner described above and inserting through the can spout 7. The upper edge of the liner spout 10 is then turned over as at 13 and held in place by the clamping means or snap ring 14. The flame arrester 15 is then seated in place and the liner contiguous to the annular seat 21 of the screen collar 16 serves as a seal for the ame arrester. The split ring l1 is then assembled in position to latch the flame arrester weeen within the spout closure and to further support the replaceable liner spout within thet can spout 7. Whenever it is desired to remove the flame arrester for cleaning or replacement, the split ring 11 may be removed at any time, permitting the llame arrester to be either removed for cleaning or replaced, after which the split ring 11 is re-secured in position.

The disposal can is preferably formed from 22 gage terne plate having suitable beaded portions formed thereon for strengthening (not shown), and the joints are suitably seam-welded at 31 and 32, and an annular supporting ring 33 is affixed and placed to the bottom of the disposal can by tacking with silver solder or welding in several places. With this construction, it is therefore possible when using an inert replaceable liner to provide all of the disposal can parts from terne plate of suitable gage material rather than the more expensive material, such as 316 stainless steel or other suitable non-corrosive material. The silver solder for soldering certain members is preferably from a suitable form of solder such as disclosed in the aforementioned application, which is easy flowing and suitably corrosive-resistant. The disposal can, made in this manner, is preferably enameled with a suitable non-corrosive enamel.

It is also preferred to construct a disposal can of this type with an improved closure device and operating mechanism 35 such as is disclosed and claimed in the aforementioned co-pending application. The closure device is mounted upon the discharge end of the spout 7 in a manner to effectively seal the spout 7 and the liner spout 10 against leakage should the disposal can be accidentally overturned or submitted to the usual Underwriters test. The closure device preferably comprises the disk or cap 24 of metal, such as brass or other suitable rigid material, and having a diameter somewhat larger than that of the opened end of the container spout 7 and the overlapped edge 13 of the replaceable liner 10. The cap 24 is provided with an annular llange within which is positioned the gasket 23 formed from Buna cork or Thiokol or other suitable compositions, such as medium hard rubber or other fibrous material having similar cushioning qualities and adapted to resist the various liquids and vapors disposed within the disposal can. The disk is fastened to the cap 24 by a screw bolt and washer construction 24 or any other suitable means, such as a layer of adhesive material, and is adapted to overlap completely and seal the open end of the spout.

Pivotally mounted on a pair of spout ears 36, silver soldered to the spout 7, is a cast lever or closure carrying member 37 which carries the closure disk 24. If desired, the closure carrying member may be in the form of a metal stamping or it may be constructed of cast metal, suchv as brass. The closure disk 24 is revolvable from closed to open position by the lever 37, having an intermediately locked arcuate boss 38 mounted on a pin or pintle 39 supported on the spout ears 36 about which the lever is fulcrumed. The other end 40 extends over the cap 24 and provides a socket 41 in which is pivotally mounted, as by a rivet 42, a stud 43 to which the closure cap 24 is secured. The socket and complementally formed stud may be constructed as disclosed and claimed in the U. S. Patent No. 2,147,230, granted to R. I. Anschicks on February 14, 1939.

The end 40 of the lever 37 is normally pressed toward the cap 24 by means of a torsion spring 44, having a V-shaped portion 45 engaging the end 40 and coil ends 46 mounted upon the pin 39 with the ends operatively engaging the side of the spout, as described in my aforementioned, co-pending application, to place the spring under suicient stress to maintain the cap in its closed position at all times to prevent spillage of the disposed liquids. The socket and stud construction 41, 43 operate 'as a universal joint when the lever end 40 is pressed ltoward the cap so that the cap is self-adjusting and seats with the cushioned disk or gasket in uniform Contact with the open end of the spout '7 and folded-over portion 13 of the liner spout 10. The automatic adjustment of the cap 24 also results in the pressure by the lever end 40 being uniformly distributedover that portion of the disk or gasket 23 in direct contact with the end face of the spout 7 and overlying portion 13 of the liner spout 10, and thereby seals the spouts regardless of irregularities in their end faces.

The cap 24 is adapted to be moved to open the spout 7 against the resistance of the coil spring 46. This is accomplished by manual actuation, of the curved handle portion (not shown) of the lever 37 downwardly from the position shown in Fig. 1 to a position complemental to a handle 47 formed as shown in Fig. l, and vaffixed by spot welding ears 48 and 49 to the dome-shaped top 6.

The handle grip is so positioned on the diameter of the disposal can that both the handle grip 47 and the cornplementally formed curved portion of the handle grip 47 may be simultaneously grasped with one hand with the lever 37 lifted to the position shown in Fig. l. In this position of the handle portion, the operator by closing his hand moves the lever toward the handle grip 47 which rotates the lever end 40 and cap 24 to their opened position. If desired, the end of the handle portion (not shown) may be latched in its position contiguous to the handle grip 47 so that the spout remains open without hand control. To accomplish this, a D-shaped swinging hook 50 is pivotally mounted to a support member 51, suitably affixed to the back of the dome of the can and adapted to engage a hook end (not shown) of the lever 37. Upon the hook 50 being released or upon the release of the handle portion of the lever 37, the spring 44 snaps the cap 24 back to closed position of the can spout 7 and liner spout 10.

The described manual manipulation of the closure operating mechanism 35 to open the spouts may be accomplished in any position of the disposal can. A handle bail 52, having a wooden handle 53, is pivotally mounted on bail ears 54, spot welded to the dome of the disposal can at an olf-center point, offering a balanced position when the can is empty or full.

In practice, the laboratory technician, when he is ready to dispose of waste liquids, opens the cap 24 as described above and discharges waste liquids into the replaceable liner 9 mounted within the disposal can. Upon release of the lever 37, the disposal can cap is closed. In practice, in discharging the waste liquids from the disposal can, the can is preferably tilted to a position by the handle bail 52 and handle grip 53 wherein the spout 7 is suitably inclined to discharge into a suitable receiving aperture of a vessel and the like for receiving the disposed liquids discharged from the replaceable liner 9 through its spout 10, the tilting being done with the spout closed. The spout of the liner 10 and the can 7 are then opened by manipulation of the lever 37 as described without further movement of the disposal can or shifting of the operators hand. The tension of the spring is such that if the disposal can should be accidentally or inadvertently overturned, there is no possible leakage through the spout 10 of the liner.

Suitable sizes in which it is preferred to fabricate the disposal can of this invention are two and ve gallons which may be readily handled but other suitable sizes of disposal cans may be fabricated without departing from the scope of the invention.

Thus, it will be seen that I have provided a simple and inexpensive form of disposal can for the temporary reception of waste liquid reagents, and the like, which in vapor or in a liquid state may be toxic, inflammable, poisonous, or the like. Likewise, I have described an improved closure construction and operating mechanism therefor, for a disposal can of this type upon which it is mounted so that uniform pressure is exerted by .the cushioned closure cap over the end face of the spout and adapted to effectively seal the spout and that of thereplaceabl'e liner regardless of anyr irregularities in the end face 'or the particular angle of inclination of the face to the vertical axis of the can.

Having thus described my invention, it is obvious that various immaterial modifications may be made in the same without departing from the spirit of my invention; hence, I do not wish to be understood as limiting myself to the exact form, construction, arrangement and combination of parts herein shown and described or uses mentioned.

What I claim as new and desire to secure by Letters Patent is:

l. The combination with a vessel having a spout, of a replaceable liner for the vessel, said replaceable liner comprising a spout complementally formed to the spout of the vessel to be received therein, securing means complementally formed to retaining means formed on the inner periphery of the spout for the vessel whereby the replaceable liner is secured in position Within the vessel,

said spout for the replaceable liner adapted to be folded f over the upper end of the spout for the vessel overlapping the upper periphery thereof, and additional securing means complementally formed to the folded-over portion of the spout for the replaceable liner and the spout for the container for securing the spout for the replaceable liner in position, and sealing the spout for the vessel to prevent fluids from entering the vessel between the outer surface of the replaceable liner and the interior of the vessel.

2. The combination with a vessel having a spout, of n a replaceable liner for the vessel, said replaceable liner comprising a spout complementally formed to the spout of the vessel to be received therein, securing means complementally formed to retaining means formed on the inner periphery of the spout for the vessel whereby the replaceable liner is secured in position within the vessel, said spout for the replaceable liner adapted to be folded over the upper end of the spout for the vessel overlapping the upper periphery thereof, additional securing means complementally formed to the folded-over portion of the spout for the replaceable liner and the spout for the container for securing the spout for the replaceable liner in position and sealing the spout for the vessel to prevent fluids from entering the vessel between the outer surface of the replaceable liner and the interior of the vessel, and closure means for sealing the peripheral edge of the spout for the replaceable liner as the spout of the liner overlies the upper edge of the spout of the vessel.

3. The combination with a vessel having a spout, of a replaceable liner comprising a spout therefor, said spout o for the vessel having an annular seat, a detachable and dependent ilame arrester complementally formed to the spout of the replaceable liner and the annular seat of the spout of the vessel for detachably mounting the llame arrester within the spout of the replaceable liner to depend within the interior of the replaceable liner assembled within the vessel, and securing means complementally formed to latching means formed on the inner periphery of the spout of the vessel and positioned above the upper edge of the flame arrester, whereby the ame arrester is detaehably secured within the spout of the container, and the spout of the replaceable liner is` also affixed to the spout of the vessel.

4. A disposal can adapted for the temporary reception of waste liquids, such as waste reagents, solutions, solvents and the like which in a vapor or in a liquid state may be toxic, inflammable, poisonous and the like, said disposal can comprising a shell, a top, a bottom, and a spout providing a large spout opening, and also comprising in combination, a replaceable liner comprising a hollow body portion Vand a spout complementally formed to the spout of the disposal can, said spout of the replaceable liner adapted to be mounted within the spout of the disposal can and overlying the top edge of the disposal can spout whereby the waste liquids are adapted to be discharged into and from the disposal can with the overlapping edge of the liner spout sealing the interior of the disposal can from the waste liquids as they are discharged into and from the disposal can, a spring-biased closure for the disposal can spout, and said closure and the foldedover portion of the spout of the replaceable liner forming a seal for the disposal can.

5. A disposal can adapted for the temporary reception of waste liquids, such as waste reagents, solutions, solvents and the like which in a vapor or in a liquid state may be toxic, inflammable, poisonous and the like, said disposal can comprising a shell, a top, a bottom, and a spout providing a large spout opening, and also comprising, in combination, a replaceable liner comprising a hollow body portion and a spout complementally formed to the spout of the disposal can, said spout of the replaceable liner adapted to be mounted within the spout of the disposal can and overlying the top edge of the disposal can spout whereby the waste liquids are adapted to be discharged into and from the disposal can with the overlapping edge of the liner spout sealing the interior of the disposal can from the waste liquids as they are discharged into and from the disposal can, a spring-biased closure for the disposal can spout, said closure and the folded-over portion of the spout of the replaceable liner forming a seal for the disposal can, a detachable dependent flarne arrester detachably mounted within the spout of the replaceable liner and the upper portion thereof complementally formed to the junction of the disposal can spout at its juncture with the top of the disposal can, and latching means complementally formed to an annular groove of the inner periphery of the spout of the disposal can, whereby the flame arrester is detachably mounted within the disposal can and the replaceable liner is secured to the spout of the disposal can.

6. A disposal can adapted for the temporary reception of waste liquids, such as waste reagents, solutions, solvents and the like which in a vapor or in a liquid state may be toxic, inflammable, poisonous and the like, said disposal can comprising a shell, a top, a bottom, and spout forming a large spout opening, and said disposal can also comprising, in combination, a replaceable liner comprising a hollow body portion and a spout complementally formed to the spout of the disposal can, said spout of the replaceable liner adapted to be mounted within the spout of the disposal can and detachably atlixed to the inner periphery thereof and overlying the top edge of the disposal can spout whereby the waste liquids are adapted to be discharged into and from the disposal can with the overlapping edge of the liner spout sealing the interior of the disposal can from the waste liquids as they are discharged into and from the disposal can, and all of the surfaces of the replaceable liner for the disposal can in direct contact with said waste liquids formed from an inert thermo-plastic elastomeric material adapted to withstand the corrosive action of said waste liquids, and said inert thermo-plastic elastomeric material formed from polymeric organic materials of the class consisting of polythan, tetra-luro-ethylene gas derivative, polytetra-iluro ethylene, and tri-fluro-chlor-ethylene polymer, and said replaceable liner adapted to be detachably mounted through the large spout opening.

' 7. A disposal can adapted for the temporary reception of waste liquids, such as waste reagents, solutions, solvents and the like which in a vapor or in a liquid state may be toxic, inflammable, poisonous and the like, comprising a dome-shaped shell, a spout providing a large spout opening through which the waste liquids are adapted to be discharged into and from the disposal can, a closure `for the spout, a replaceable liner comprising a hollow body portion and a spout complementally formed to the interior of the disposal can and to the spout therefor, said replaceable liner adapted to be folded to be inserted through the spout of the disposal can, and in its unfolded position within the disposal can adapted to receive the waste liquids, said spout of the replaceable liner adapted to be detachably affixed to the interior of the spout for the disposal can with the spout of the replaceable liner providing a seal for the spout of the disposal can, a detachable and dependent flame arrester detachably mounted within the spout of the replaceable liner, and said large spout opening upon removal of the detachable llame arrester permitting the interior of the replaceable liner to be cleaned and also permitting the replaceable liner to be detached and removed through the large spout opening,

8. A laboratory disposal can adapted for the reception of waste liquids comprising a discharge and receiving spout, a closure therefor, a detachable iire bafe screen mounted within the spout, a replaceable liner comprising a hollow body portion and a spout complementally formed to the spout of the disposal can, said replaceable liner detachably mounted through the spout of the disposal can, means for detachably aixing the spout of the liner to the inner periphery of the spout of the disposal can, said detachable re baie screen complementally formed to the juncture of the spout of the disposal can with the top of the disposal can, said means for detachably aiixing the spout of the liner to the spout of the disposal can detachably securing the re baie screen in the spout of the disposal can, a carrying bail for the disposal can and a handle grip for the disposal can adapted for pouring the waste liquid from the disposal can, closure operating mechanism adapted for opening and closing the closure, said closure and the overlapping edge of the spout of the replaceable liner at its overlies the upper edge of the spout of the disposal can providing a seal for the disposal can, and the closure operating mechanism comprising a lever complementally formed to the handle grip whereby upon movement of the handle portion of the closure operating mechanism toward thehandle grip, the closure is adapted to be opened and, upon release, the closure is adapted to be biased to its closed position, sealing the spout of the replaceable liner.

9. As an article of manufacture, a replaceable liner for a disposal can having a spout and adapted for the reception of waste liquids, said replaceable liner formed from inert thermo-plastic elastomeric material inert to waste liquids, such as waste reagents, solutions, solvents and the like which in a vapor or in a liquid state may be toxic, inammable, poisonous and the like, said inert 4 thermo-plastic elastomeric material formed from polyethylene, and tri-uro-chlor-ethylene polymer, and comprising a hollow body portion, a spout for the replaceable liner complementally formed to the spout of the disposal can, said hollow body portion comprising a top portion, bottom portion, and an intermediate tubular portion, the seams of which are heat-sealed, and said replaceable liner adapted to be folded to a size to be inserted through the spout for the disposal can, whereupon it may be unfolded to be complementa) to the interior of the disposal can, and the spout of the replaceable liner adapted to be detachably affixed to the inner and outer peripheries of the spout of the disposal can forming a seal between the outer periphery of the liner and the inner periphery of the disposal can.

l0. As an article of manufacture, a replaceable liner for a laboratory disposal can7 said replaceable liner formed of inert thermo-plastic elastomeric material, said inert thermo-plastic elastomeric material formed from polymeric organic materials of the class consisting of polythan, tetra-iluro-ethylene gas derivative, poly-tetra-iluroethylene, and tri-uro-chlor-ethylene polymer, the body portion of the replaceable liner formed by overlying sheets of the material and heat-sealing the peripheral edges to form a sealed container, a spout formed from the same material and heat-sealed to the body of the liner, and said replaceable liner adapted to be folded upon itself to be inserted through the spout of the disposal can to form an inert liner for the disposal can, and said spout of the replaceable liner adapted to be detachably aiixed to the spout of the disposal can to secure the replaceable liner in position within the disposal can.

References Cited in the tile of this patent UNITED STATES PATENTS 1,120,313 Kessler Dec. 8, 1914 1,312,822 Anderson Aug. 12, 1919 1,663,947 Kessler Mar. 27, 1928 1,709,701 Althoff Apr. 16, 1929 1,725,386 Anschicks Aug. 20, 1929 2,626,885 Gollings Ian. 27, 1953 FOREIGN PATENTS 662,970 France Mar, 29, 1929 430,256 Great Britain Jan. 17, 1935 592,983 Great Britain Oct. 6, 1947 982,374 France Ian. 24, 1951 

